mother of Satan n. the chemical triacetone triperoxide, used in the making of explosives. (source: Double-Tongued Dictionary)
Further reading
Suzanne in Tucson, Arizona, says her mother used to say the following to her quickly: Will you? Won’t you? Can’t I coax you? Aw, c’mon! You said you would! You think you might? You promised me! Won’t your mama let ya, huh...
Aubrey in Waco, Texas, says her mother used to warn the kids against contracting honkus of the bonkus, a fanciful name for a contagious disease. This colloquial term probably comes from the words bonk and konk, meaning “to hit” or...